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GCC pure virtual method called | Software Architecture

https://tombarta.wordpress.com/2008/07/10/gcc-pure-virtual-method-called

Html { display: awesome; }. GCC pure virtual method called. July 10, 2008 in C. I spent about two hours today trying to debug a race condition in a multi-threaded C app today… definitely not a fun thing to do. The worst part? The runtime diagnostics weren’t giving me. Useful to work with! Sometimes things just worked, sometimes I got segmentation faults inside old, well-tested parts of the application. At one point, I saw this error pop up:. Lo and behold, I confirmed that polymorphism. Here’s abou...

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operator, and assert | Software Architecture

https://tombarta.wordpress.com/2009/12/22/operator-comma-and-assert

Html { display: awesome; }. Operator, and assert. December 22, 2009 in C. How many times have you ever. Used the comma operator in live C or C code? I’ve seen a Boost project use it as convenience notation for small compile-time datasets, but that’s about it. So, here’s an example of an absolutely. Way to use it (yes… this is how I blow off steam at work):. Include stdio.h #include string.h int main(int argc, char * argv) { return argc 1? Puts(foo),0) : (puts(not foo),1) : 1; }. Gcc test.c -E -DNDEBUG.

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GCC Compiler-Defined Macros | Software Architecture

https://tombarta.wordpress.com/2008/08/09/gcc-compiler-defined-macros

Html { display: awesome; }. August 9, 2008 in C. I recently stumbled across an article referencing macros defined by gcc. That list is pretty daunting! If you compare it to GCC Common Predefined Macros. The official source), you realize quite fast that a lot of those macros exist for the benefit of. Library authors—not compiler end users such as myself. So here’s a bit of a smaller list that I usually have up my sleeves:. Use this instead of. Simple, and useful for code that needs to be compatible across...

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integer micro-optimizations | Software Architecture

https://tombarta.wordpress.com/2009/12/04/integer-micro-optimizations

Html { display: awesome; }. December 4, 2009 in ASM. I like to sneak bitshifts into interviews—not because they’re used commonly in modern C code, but because they. Used to be common. As a way of getting good performance out of poor compilers. It’s very useful to know the tricks of the past, if you ever find yourself maintaining code written by an earlier generation of programmer. Take this example:. Unsigned imul(unsigned x) { return x * 10; } unsigned bitshift(unsigned x) { return (x 3) (x 1); }. If yo...

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C++ stack traces with GCC | Software Architecture

https://tombarta.wordpress.com/2008/08/01/c-stack-traces-with-gcc

Html { display: awesome; }. C stack traces with GCC. August 1, 2008 in C. First, a word of warning:. This is not portable. Secondly… being able to produce stack traces (outside of the debugger) is something that’s usually reserved for languages like Python or Java… but it’s quite nice to have them in C . There’s several hurdles to overcome, however. This part is pretty easy, but unless you’re nosy with the header files in. It’s not likely to stumble upon this by chance. You pass me a buffer created by.

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worpdess | Software Architecture

https://tombarta.wordpress.com/2013/02/24/worpdess

Html { display: awesome; }. February 24, 2013 in CS 527. If the first version has a capital “P”, then my blog host has decided to usurp my editorial control by default. Wonderful. Harder, Better, Stronger, Faster. Ralph Johnson’s Blog. Ancient Domains of Mystery. Order of the Stick. The Perry Bible Fellowship. This looks like a title. And i bet this text will display on my main page. If i had a theme song, I would write the lyrics here. Don’t Click These! Comments feed for this article.

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coverage is necessary but not sufficient | Software Architecture

https://tombarta.wordpress.com/2008/05/27/coverage-is-necessary-but-not-sufficient

Html { display: awesome; }. Coverage is necessary but not sufficient. May 27, 2008 in C. I’ve had several conversations with people who seemed overly proud about 100% code-coverage in their unit tests. Obviously, that’s a good thing: the more test cases, the less likelihood of a latent fault existing in the software. But code coverage has its dark side, too. Take a look at this (extremely contrived) C example:. Unsigned int noop(unsigned int x) { unsigned int y = x 4; return y 4; }. It may not be obvious...

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fun with awk | Software Architecture

https://tombarta.wordpress.com/2008/07/12/fun-with-awk

Html { display: awesome; }. July 12, 2008 in awk. I admit, I’ve been experimenting more with. Lately. Generally, my opinion has always been, “If it’s not simple enough for. I’d rather use python/perl/ruby.” Figured I’d simplify my life by having one less flavor of syntax/regexps to worry about. What a silly idea! While Python may be great for “enterprise-class”. Log analysis, nothing beats awk for one-liners. Take a few examples off the top of my head…. Who’s trying to hack me? Ralph Johnson’s Blog.

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25 | May | 2008 | Software Architecture

https://tombarta.wordpress.com/2008/05/25

Html { display: awesome; }. You are currently browsing the daily archive for May 25, 2008. May 25, 2008 in C. GCC has flags. A lot. Of them. I’ve spent a fair amount of time going through the man-page trying to figure out the best “general purpose” set of flags for my own personal development. Here’s what I use as the baseline for my home C projects (GCC 4.3.0, linux, old Intel Pentium4) YMMV, especially with third-party tools, since a lot of these settings are. Namespace foo ;. D STDC FORMAT MACROS.

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gcc flags | Software Architecture

https://tombarta.wordpress.com/2008/05/25/gcc-flags

Html { display: awesome; }. May 25, 2008 in C. GCC has flags. A lot. Of them. I’ve spent a fair amount of time going through the man-page trying to figure out the best “general purpose” set of flags for my own personal development. Here’s what I use as the baseline for my home C projects (GCC 4.3.0, linux, old Intel Pentium4) YMMV, especially with third-party tools, since a lot of these settings are. Likely to break on code that didn’t use it from the get-go (. Namespace foo ;. D STDC FORMAT MACROS.